gem/openquake — pull request #561 by kpanic (2011-10-31 13:46:22+00:00)
Title: vf_ref (db level changed) and vulnerabilityFunctionReference changed

vf_ref (db level changed) and vulnerabilityFunctionReference changed -> to taxonomy

Addresses the first 'step' of bug https://bugs.launchpad.net/openquake/+bug/859543

exposure, code and tests adapted accordingly.
This is just a renaming effort but pay attention to all the renamings in **code/tests**

thanks